s = input()
if s[0] == s[1] == s[2] == "R":
    print(3)
elif s[0] == s[1] == "R" or s[1] == s[2] == "R":
    print(2)
elif s[0] == "R" or s[1] == "R" or s[2] == "R":
    print(1)
else:
    print(0) s = input() s input() input if s[0] == s[1] == s[2] == "R":
    print(3)
elif s[0] == s[1] == "R" or s[1] == s[2] == "R":
    print(2)
elif s[0] == "R" or s[1] == "R" or s[2] == "R":
    print(1)
else:
    print(0) s[0] == s[1] == s[2] == "R" s[0] == s[1] == s[2] s[0] == s[1] s[0] s 0 s[1] s 1 s[2] s 2 "R" print(3) print 3 elif s[0] == s[1] == "R" or s[1] == s[2] == "R":
    print(2) s[0] == s[1] == "R" or s[1] == s[2] == "R" s[0] == s[1] == "R" s[0] == s[1] s[0] s 0 s[1] s 1 "R" s[1] == s[2] == "R" s[1] == s[2] s[1] s 1 s[2] s 2 "R" print(2) print 2 elif s[0] == "R" or s[1] == "R" or s[2] == "R":
    print(1) s[0] == "R" or s[1] == "R" or s[2] == "R" s[0] == "R" or s[1] == "R" s[0] == "R" s[0] s 0 "R" s[1] == "R" s[1] s 1 "R" s[2] == "R" s[2] s 2 "R" print(1) print 1 print(0) print 0 s = input() input() s
s = input()
if s[0] == s[1] == s[2] == "R":
    print(3)
elif s[0] == s[1] == "R" or s[1] == s[2] == "R":
    print(2)
elif s[0] == "R" or s[1] == "R" or s[2] == "R":
    print(1)
else:
    print(0)